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"Concentration standard deviation of caesium {Cs CAS 7440-46-2} per unit volume of rainwater [dissolved plus reactive particulate <0.4/0.45um phase]"@en .
"The square root of the average of the squares of deviations about the mean of a set of values of the specified measurement."@en .
"Cs_rainwater<0.4/0.45_SD" .
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